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Projects
Flood Study Queensland
A major flood study was undertaken for a complex 18,000 km2 catchment in Queensland to establish the design flood levels across the site under design and proposed development conditions.
Hydrological modelling was undertaken using RAFTS (ARR2019) and flood modelling was undertaken using TUFLOW QUADTREE. The flood models were calibrated using historical flood data prior to use for design purposes.
Design flood events modelled included the 10%, 1%, 0.5%, 1% AEP climate change and seasonal flow conditions.
The results of the flood study were used to identify the upgrading requirements for the site.
Detailed Design of Stormwater Detention Basin Liverpool
Design of a major regional basin was undertaken in Liverpool to cater for new development in the area. This included geotechnical, site contamination, environmental, hydrology, flooding, water quality, urban planning, vegetation management, potholing, survey and stormwater drainage investigations. Concept design were undertaken, followed by the preparation of detailed design, construction drawings and specifications.
Hydrologic (RAFTS) and hydraulic modelling (TUFLOW), dam break analysis, flood impact assessment and flood mapping were undertaken for the full range of design flood events (ARR2019), including the 20%, 5%, 1% AEP, climate change and PMF events. Water quality modelling was undertaken using MUSIC. Stormwater drainage modelling was undertaken using DRAINS. 3D walkover and drive-through visualisations were prepared to demonstrate the integration of the proposed regional basin and design features with the surrounding environment.
Stakeholder liaison included Council, NSW Dam Safety Committee, Sydney Water (sewer), Energy Australia (power), Jemena (gas), APA (high pressure gas), and Gateway.
Detailed Design of Stormwater Basin 5, 6, 11, 12, 14, 29, Austral and Leppington
Project investigation, detailed designs and construction drawings were prepared for 6 stormwater basins in the Austral - Leppington area. This included the design of flood storage detention basins, stormwater drainage and hydraulic structures and WSUD measures to meet specific water quality improvement targets and design requirements. The design package also included bulk earthwork plans, quantities and cost estimates.
Tight delivery deadlines were met for each basin, and our team was praised by Council for our work quality, reliability, responsiveness, flexibility, ease of communication & co-operation, and conscientious efforts in meeting Council needs that arose during the project.
Bidjigal Creek Rehabilitation Timothy Avenue, Castle Hill
Bidjigal Creek is located within the Timothy Avenue Reserve, Castle Hill. It is bounded to the north-west by Timothy Avenue and to the south-west by residential properties that front Aubrey Close and Walsh Avenue.
Bidjigal Creek at Timothy Reserve is a deeply incised creek and suffered many years of neglect within an increasingly urbanised catchment. Sewer drainage lines generally follow the general alignment of the creek but is known to cross the waterway at several locations.
The aim of this rehabilitation project was to restore the natural and recreational values of the waterway and encourage a “river experience” for the community who use and live around the Reserve. This included the provision of strong links between the use of the Reserve and Bidjigal Creek, thus improving the environmental benefits and natural function of the waterway.
Wilson Creek Rehabilitation - Detailed Design
Working closely with Fairfield City Council, detailed design and rehabilitation of Wilson Creek at Bonnyrigg Heights was undertaken to address Council's concern in rapid deepening and widening of the creek due to recent developments. Rehabilitation and stabilisation of the creek beds and banks were undertaken. Consultation and collaboration with Sydney Water ensured all their assets within the site boundary remained protected. This included concrete encasing all exposed sewer pipes along and across the creek.
Wilson Creek Rehabilitation - Flood Assessment
Wilson Creek Rehabilitation - Flood Assessment
We were engaged by Fairfield City Council to undertake detailed hydrology and hydraulic modelling of Wilson Creek using XP-RAFTS and TUFLOW software to ensure that no private property is flood affected as a result of the proposed works within the catchment. This included the modelling of all events up to the 1% AEP event.
Water Management Infrastructure - East Leppington, Liverpool
The primary objective of the project was to undertake concept and detailed design of proposed flood mitigation and water quality control structures within the project area identified in Council's Water Catchment Management Strategy.
The structures included flood detention basins, bio-retention basins and channel modification works. The project also included stormwater analysis, concept and detailed design of major trunk drainage systems. prior to discharge into the receiving waterways.